Chew a piece of peppermint or spearmint gum

You’ll get a burst of energy from the invigorating flavor and scent, not to mention the physical act of chewing (it’s hard to chew if you’re asleep).

Eat every four hours

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It’s much better to continually refuel your body before it hits empty than to wait until you’re in the danger zone and then overdo it. So every four hours (except, of course, when you’re sleeping), have a mini-meal or snack. A mini-meal might be a handful of roasted peanuts, a hard-boiled egg or slice of lean luncheon meat, and a sliced apple. Nonfat yogurt sprinkled with flaxseeds makes a great snack.